how to call external C# script or java script in unity

i am trying to make a game in which i need to call external c# script in unity can anyone please help me

What do you mean by external C# ? Please be more specific.

Meanwhile I’ll make a wild guess at what you are attempting.

If you want to call C# scrpit from java script make sure the C# script is compiled before the java script.

external C# script means the c# script which is not mono behavior script